Mining-machine



' (No Modei.)

.. WI-LVERTH.

' MINING MACHINE; V

No. 289,742. Patented Dec. 4, 1883.

UNITED STATES PATENT OFFICE.

HENRY VILVERTTT, OF ST. CHARLES, KENTUCKY.

MINING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 289,742, dated December4, 1883.

Application filed October 16, 1882. (No model.)

nal section of the joint or pivot for the swinging beam.

The object of my invention is to provide a new and improvedcoal-excavator; and it consists of a tubular standard on a suitablebase, having at its upper end a head screw-threaded within to receive ascrew-threaded rod, so that when the standard is placed in the channelof a mine the screw-rod performs the office of a jack and holds thestandard firmly between the floor and roof of the channel. The standardis further provided with a crane,which is capable of swinging aroundfrom side to side. A balanced lever having at one end a handle and atthe opposite end the excavating-bit is attached to the end of the craneby a chain and balanced, all of which will now be described in detail.

In the accompanying drawings, A represents a suitable base composed of acrosspiece of any convenient size or shape.

B is a tubular standard, preferably made of gas-pipe, securedpermanently to the basepiece A. The upper end of the standard has ahead,0, screwed thereon. The head has a screw-threaded aperture to receive ascrewthreaded shaft or rod, D, provided with a swivel-head, E. The rod Dhas also holes F at the upper end, to enable a small hand lever or rodto be placed therein for the purpose of manipulating the screw. The bodyof the tubular standard B has a series of holes, G, in one side, asshown. The standard carries an arm or crane, H, which arm is pivoted onthe standard by suitable bearings, I. One of these bearings is' providedwith a thumb-nut,- J, so that when the crane has been rotated to anypoint the thumb-nut will hold it in position. Pins placed in theholes Gserve to hold the crane after being vertically adjusted. The

outer end of the crane is provided with an eye,

K, to which is attached the pendent chain L.

The beam M, which carries the excavatingbit, is made of any suitablesize and length, and is provided at the forward end with a socket oreye, to which the bit N may be attached. At a point near the center isarib or shoulder, O, and a thimble or globular coupler, P, is placed onthis beam loosely, so that one side rests against the shoulder O. A pin,Q, through the beam serves to hold the coupler in position. The coupleris provided with two lugs'or studs, R, which project out on oppositesides at right angles to the line of the beam. A loop, S, having a hook,is secured to these projecting lugs R, and the hook T is attached to thependent chain, so that the beam is carried thereby. A weight, U, isplaced on the rear endof the beam, to counterbalance the forward end ofthe beam. At the extreme rear end of the beam is an arm, V, projectingupward at right angles from the beam M. This arm is adjustable by meansof the bolt V, as shown.

W represents a bar having its forward end forked and-attached to thelugs or studs R, projecting from the coupler 1?. Its rear end isattached to the arm V, and carries also a cross-handle, X, by meansofwhich the operator manipulates the beam. A handle, Y, is also placed onthe bar \V at a suitable point between the arm V and the coupler I.

It will be observed that in operation the beam is counterbalanced by theweight U, and is capable of being turned or revolved in the coupler P,when the set-screw or bolt V is released, thus enabling the operator toincline the prongs of the forked bit N in any direction. It is alsoobvious that when the beam is thus suspended on the crane H the bit maybe directed to any point by means of thehandles X Y, and propelledforward with great force against the mass of coal.

The operation is as follows: The base and standard are placed in thechannel at a suitable point, and the j ack-screw at the upper endemployed to hold the same gfirmly'betweea the floor and wall. The craneHis then turned to the proper position to permit the swingingbeam towork freely and not obstructively.

The operator then grasps the handles KY, and, drawing back the same,propels the beam forward in the direction required. The weight of thebeam, the counter-balance U, and the globe-coupling 1? all serve tofurnish momentum in the operation.

WVhat I claim is I 1. In coal-excavators, the rotatable beam M, havingcentrally the globe-connection I and at the rear end the adjustable arm,in eombination with the bar WV, hinged at its forward end to theglobe-coupling, and attached at its rear end to the arm V, and with thecrane H, to which it is suspended by the chainL, substantially as andfor the purpose set forth.

2. The base A and tubular standard B, having at its upper end thejack-screw and the rotating crane H, as shown, in combination with therotatable beam M, having the globular coupling 1?, counter-weight U, andadjustable 2o arm V, and with the forked bar W, handles X Y, and loop S,hook T, and supporting-chain L, substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand,this 2d day of 25

